用贝尔-努尼扎托型模型研究热放松的多组件流
Chao Zhang1, Lifeng Wang1,2
1Institute of Applied Physics and Computational Mathematics, Beijing 100094, China.
Physical review. E
|November 18, 2023
概括
多元组件流中的热放松显著抑制了惯性封闭融合 (ICF) 爆发中的雷利-泰勒不稳定性. 这项研究模拟了这些流动,以了解温度分离对混合和融合燃烧的影响,这对于点火至关重要.
科学领域:
- 物理 物理学 物理
- 等离子体物理学的物理学
- 计算流体动力学的流体动力学.
背景情况:
- 在惯性封闭融合 (ICF) 爆炸中混合会降低点火.
- 在异质混合流中,温度分离是关键因素.
- 之前的实验强调了温度分离的重要性.
研究的目的:
- 开发一个热不平衡多元组件流的模型.
- 为了研究温度分离对混合和融合燃烧的影响.
- 研究热放松多元组件系统中的雷利-泰勒 (RT) 不稳定性.
主要方法:
- 从Baer-Nunziato模型中推导出热不平衡的多元流量模型.
- 通过考虑小的克努森数和使用速率不平衡的扩散定律来简化模型.
- 开发有效的数值方法来解决拟议的模型.
- 模型的应用来模拟在ICF减速阶段的RT不稳定性.
主要成果:
- 为热不平衡的多元组件流量得出了一个可负担得起的计算模型.
- 该模型成功地捕获了有限温度放松效应.
- 数字模拟表明,热放松在高密度/低温和低密度/高温组件之间的接口上显著抑制RT不稳定性.
结论:
- 开发的模型为研究ICF的热不平衡效应提供了一个强大的框架.
- 热放松是缓解RT不稳定性增长的关键机制.
- 了解和控制温度分离对于在ICF中实现点火至关重要.
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